diff --git a/panda/src/pipeline/mutexDebug.cxx b/panda/src/pipeline/mutexDebug.cxx
index 272f8039f1..9ce9d8a5a7 100755
--- a/panda/src/pipeline/mutexDebug.cxx
+++ b/panda/src/pipeline/mutexDebug.cxx
@@ -22,9 +22,6 @@
 
 #ifdef DEBUG_THREADS
 
-MutexDebug::VoidFunc *MutexDebug::_pstats_wait_start;
-MutexDebug::VoidFunc *MutexDebug::_pstats_wait_stop;
-
 MutexImpl MutexDebug::_global_mutex;
 
 ////////////////////////////////////////////////////////////////////
@@ -71,24 +68,6 @@ output(ostream &out) const {
   }
 }
 
-////////////////////////////////////////////////////////////////////
-//     Function: MutexDebug::set_pstats_callbacks
-//       Access: Public, Static
-//  Description: This special function exists to provide hooks into
-//               the PStatClient system, so we can time the amount of
-//               time we spend waiting for a mutex lock (if the user
-//               configures this on).  We have to do this nutty void
-//               function callback thing, because PStats is defined in
-//               a later module (it depends on this module, because it
-//               needs to use mutex locks, of course).
-////////////////////////////////////////////////////////////////////
-void MutexDebug::
-set_pstats_callbacks(MutexDebug::VoidFunc *wait_start, 
-                     MutexDebug::VoidFunc *wait_stop) {
-  _pstats_wait_start = wait_start;
-  _pstats_wait_stop = wait_stop;
-}
-
 ////////////////////////////////////////////////////////////////////
 //     Function: MutexDebug::do_lock
 //       Access: Private
@@ -124,11 +103,6 @@ do_lock() {
 
   } else {
     // The mutex is locked by some other thread.
-#ifdef DO_PSTATS
-    if (_pstats_wait_start != NULL) {
-      (*_pstats_wait_start)();
-    }
-#endif  // DO_PSTATS
 
     // Check for deadlock.
     MutexDebug *next_mutex = this;
@@ -138,12 +112,6 @@ do_lock() {
         report_deadlock(this_thread);
         nassert_raise("Deadlock");
 
-#ifdef DO_PSTATS
-        if (_pstats_wait_stop != NULL) {
-          (*_pstats_wait_stop)();
-        }
-#endif  // DO_PSTATS
-
         _global_mutex.release();
         return;
       }
@@ -184,13 +152,7 @@ do_lock() {
     _locking_thread = this_thread;
     ++_lock_count;
     nassertv(_lock_count == 1);
-
- #ifdef DO_PSTATS
-    if (_pstats_wait_stop != NULL) {
-      (*_pstats_wait_stop)();
-    }
-#endif  // DO_PSTATS
-   }
+  }
 }
 
 ////////////////////////////////////////////////////////////////////
diff --git a/panda/src/pipeline/mutexDebug.h b/panda/src/pipeline/mutexDebug.h
index 12449baf90..f504c8c7a9 100644
--- a/panda/src/pipeline/mutexDebug.h
+++ b/panda/src/pipeline/mutexDebug.h
@@ -49,7 +49,6 @@ public:
   virtual void output(ostream &out) const;
 
   typedef void VoidFunc();
-  static void set_pstats_callbacks(VoidFunc *wait_start, VoidFunc *wait_stop);
 
 private:
   void do_lock();
@@ -65,8 +64,6 @@ private:
   int _lock_count;
   ConditionVarImpl _cvar;
 
-  static VoidFunc *_pstats_wait_start, *_pstats_wait_stop;
-
   static MutexImpl _global_mutex;
 
   friend class ConditionVarDebug;